US5185921A - Method of making a string of cathodic protection anodes - Google Patents
Method of making a string of cathodic protection anodes Download PDFInfo
- Publication number
- US5185921A US5185921A US07/787,249 US78724991A US5185921A US 5185921 A US5185921 A US 5185921A US 78724991 A US78724991 A US 78724991A US 5185921 A US5185921 A US 5185921A
- Authority
- US
- United States
- Prior art keywords
- anode
- connector
- wire
- parts
- anodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004210 cathodic protection Methods 0.000 title description 3
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 14
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010936 titanium Substances 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 239000010955 niobium Substances 0.000 claims abstract description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000005219 brazing Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 239000000565 sealant Substances 0.000 abstract description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 8
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 238000004382 potting Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229920006370 Kynar Polymers 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 229910003455 mixed metal oxide Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000012812 sealant material Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/50—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
- H01R4/5083—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a wedge
- H01R4/5091—Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw using a wedge combined with a screw
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
- H01R4/308—Conductive members located parallel to axis of screw
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/28—Clamped connections, spring connections
- H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
- H01R4/42—Clamping area to one side of screw only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
Definitions
- This invention relates generally as indicated to a cathodic protection anode and connector; more particularly to a tubular anode and connection; and also to a method of making a continuous lead wire string anode using such connector.
- Tubular anodes are widely used in cathodic protection, and may be formed of a variety of materials such as high silicon cast iron, graphite, carbon, magnetite, steel, titanium, niobium, and tantalum and alloys thereof. Titanium tubular anodes with mixed metal oxide exterior coatings are now employed. These tubular anodes are relatively long, yet of small diameter and fairly thin walled.
- mixed metal oxide anodes are used in deep or surface ground bed applications to protect pipelines, underground storage tanks, etc. from corrosion.
- a compression tool is used to establish an electrical connection from cable to anode at either one or both anode ends.
- problems associated with corrosion and ultimate penetration of these anode walls results in anode loss due to connection failure. This is extremely critical in the case of multiple anodes assembled on strings whereby one anode penetrated results in loss of succeeding anodes on the string.
- FIGS. 8 and 9 there is disclosed an embodiment wherein the wedge parts are drawn together by a threaded stud, and a nut/cinch assembly. While this embodiment may have utility in fairly large internal diameter tubes, in a smaller and long tube it would have little practical utility.
- the present invention comprises then certain improvements in an anode and wedge connection such as seen in prior U.S. Pat. No. 4,515,669.
- a tubular anode includes an electrical connector formed of a diagonally split two-part generally cylindrical slug.
- the diagonal slit provides an elliptical wedge interface between the two parts and a jack screw is threaded in one part and extends through an enlarged hole in the other. Tightening the jack screw within the tube causes the two parts to offset and wedge against the inside of the tube.
- the two parts include an aligned slot which intersects the major axis of the elliptical interface and a lead wire or cable is electrically secured to one of the parts within its slot.
- the slot is configured to press the lead or cable against the interior of the tube.
- the lead wire for a string anode extends through the slot of the other part.
- tubular anodes In the formation of an anode string the tubular anodes are threaded onto unspooled insulated wire or cable, a short portion of the insulation is removed at each connector location, and with the tubular anode offset, a connector is secured to the bare wire. The tube is threaded over the connector and the connector locked in place.
- the connector may be encapsulated by filling the interior with a potting compound or sealant. The connector and process is particularly useful with relatively small diameter titanium tubular anodes.
- FIG. 1 is a side elevation of a connector in accordance with the present invention
- FIG. 2 is a front elevation of the connector as seen from the line 2--2 of FIG. 1;
- FIG. 3 is a transverse section of the connector as taken from the plane of FIG. 1 or normal to FIG. 2, and showing a wire or cable connected thereto;
- FIG. 4 is a similar section illustrating the relative movement of the two parts
- FIG. 5 is a similar section illustrating the connector secured inside the anode
- FIG. 6 is a horizontal section through the anode above the connector as seen from the line 6--6 of FIG. 5;
- FIG. 7 is a longitudinal section broken away of a center connected anode in accordance with the present invention.
- FIG. 8 is a schematic illustration of the process steps involved in utilizing the connector of the present to form an anode string.
- FIGS. 5, 6, 7 and 8 The tube alone is shown in FIGS. 1 and 2 while the connector with the lead wire or cable attached is shown in FIGS. 3 and 4.
- the connector 12 comprises a two-part generally cylindrical slug which is diagonally split as indicated at 14 to form a first or one part 15 and a second or other part 16.
- both parts are provided with an aligned channel or slot 18 which is formed by the channel or slot 19 in the first part and the slot or channel 20 in the second part.
- the aligned slots 19 and 20 also have a center axis of alignment which intersects the major axis of the elliptical interface shown at 22 between the two parts created by the diagonal slit 14.
- the edges of the aligned channels are relieved as indicated by the flats at 23 to permit the cable or wire to project beyond the circle of the cylinder to bear against the tube when the connector is tightened.
- the second part 16 is provided with an axial tapped hole seen at 26 in which is threaded a jack screw 27 which is provided with an enlarged cap 28 having a hexagonal socket 29. While threaded into the second part, the jack screw extends with clearance through enlarged hole or slot 30 in the first part 15.
- the hole 30 is an enlarged slot which is extended in the same direction as the major axis of the elliptical interface 22.
- FIGS. 3 and 4 illustrate the continuous lead or cable shown at 32 electrically secured at 33 in the channel 19 of the one or first part 15.
- the lead or cable may be secured in such channel by soldering, brazing, or even exothermic welding.
- the lead or cable simply extends through the slot 20 in the other part.
- the connector is inserted with close clearance into the interior of the tube 10, preferably to the center or midway between the ends of the tube.
- a suitable hex driving tool is then employed to rotate the jack screw causing the two parts to move relative to each other along the diagonal elliptical wedge interface with the two parts wedging or bearing firmly against the interior of the tube as illustrated.
- Such tightening of the jack screw forces the lead or cable 32 and the brazed connection 33 directly against the interior wall of the tube.
- the jack screw has been suitably torqued the cable or lead is electrically connected to the anode.
- the interior of the anode may preferably be filled with a special high dielectric sealant or potting compound indicated at 36.
- the anode may be filled with such sealant simply by plugging one end and pouring it in from the opposite end with the sealant in liquid condition running through the connector as indicated in FIG. 7 at 38.
- the sealant simply runs through the enlarged jack screw slot as indicated at 39 and through the clearance slot as indicated at 40.
- the sealant may be placed by pouring from both ends in two steps or injected into one or both ends. When the sealant solidifies the connector is encapsulated within the interior of the anode.
- the lead 33 may be a No. 6 or No. 8 dual jacketed cable which is normally provided with a relatively heavy exterior jacket 42 and an interior jacket 43, the latter being KYNAR insulation material.
- KYNAR® is a registered trademark of Pennwalt Corporation of Philadelphia, Penn.
- the exterior jacket is removed from a point inside the ends of the anode and the interior jacket is removed from the cable or lead at the brazing area or as the cable passes through the slots of the connector.
- a secure center connected anode for small diameter thin walled titanium tube and the like As an example, the drawings are at about twice the scale of such tubing, and a single anode may be about four feet in length.
- FIG. 8 illustrates a method of forming an anode string using the thin walled tubular titanium, niobium or tantalum anodes of the present invention and the connector of the present invention.
- a length of cabling 42 is unspooled and a series of tubular anodes 10 are simply threaded thereover.
- a short length of insulation is removed as seen at 46 and the connector 12 is brazed to the cable.
- the tubular anode which has been offset is then simply moved in the direction of the arrows 48 to thread the tubular anodes over the connectors secured to the cabling until the connectors are in the center of the anode.
- the connectors are then tightened down and the anode filled with sealant to encapsulate the connector in the center of the anode.
- a string of center connected anodes can easily be formed without cutting the conductor and without crimping or physically damaging the anode in any way.
- the present invention then provides a screw lock connector which can easily be centrally located inside the tubular anode body and which when tightened compresses the anode lead wire to the body of the anode.
- the anode is filled with the high dielectric sealant material and this provides an effective center connected anode which alleviates problems which may be caused by the use of a compression tool to establish an electrical connection from the cable to the anode at either one or both anode ends.
- the invention is particularly useful with the small diameter thin walled titanium, niobium or tantalum tubular anodes with the oxide exterior coating, the invention is also useful with other types of tubular anodes.
- the two parts of the connector may readily be fabricated from a conductive slightly malleable metal or alloy such as brass, copper, zinc, aluminum or steel.
Landscapes
- Prevention Of Electric Corrosion (AREA)
Abstract
Description
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/787,249 US5185921A (en) | 1991-04-24 | 1991-11-04 | Method of making a string of cathodic protection anodes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/690,657 US5090924A (en) | 1991-04-24 | 1991-04-24 | Cathodic protection anode, connector, and method of making |
US07/787,249 US5185921A (en) | 1991-04-24 | 1991-11-04 | Method of making a string of cathodic protection anodes |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/690,657 Division US5090924A (en) | 1991-04-24 | 1991-04-24 | Cathodic protection anode, connector, and method of making |
Publications (1)
Publication Number | Publication Date |
---|---|
US5185921A true US5185921A (en) | 1993-02-16 |
Family
ID=27104640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/787,249 Expired - Lifetime US5185921A (en) | 1991-04-24 | 1991-11-04 | Method of making a string of cathodic protection anodes |
Country Status (1)
Country | Link |
---|---|
US (1) | US5185921A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340455A (en) * | 1993-01-22 | 1994-08-23 | Corrpro Companies, Inc. | Cathodic protection system for above-ground storage tank bottoms and method of installing |
US5743675A (en) * | 1994-08-03 | 1998-04-28 | Mears/Cpg, Inc. | Underground cable anode installment system |
US5885427A (en) * | 1997-06-12 | 1999-03-23 | Corrpro Companies, Inc. | Cast iron anode and method of making |
US20120125655A1 (en) * | 2010-11-23 | 2012-05-24 | Schutt William R | Seal for anode connection to cable and method of use |
WO2012071032A1 (en) * | 2010-11-23 | 2012-05-31 | Schutt William R | Seal for anode connection to cable and method of use |
CN112195473A (en) * | 2020-09-12 | 2021-01-08 | 青岛赢海防腐防污技术有限公司 | Power-on protection device for inner wall of pipeline, construction method and machining method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3134731A (en) * | 1960-02-05 | 1964-05-26 | Sarl Soc D Etudes Contre La Co | Flexible anode device for use in the cathodic protection of metal structures |
CA689461A (en) * | 1964-06-23 | M. L. Heuze Bernard | Electrode structure | |
US3326791A (en) * | 1962-05-26 | 1967-06-20 | Contre La Corrosion S E C C O | Method and structure for connecting electrodes to feed cables |
GB1548367A (en) * | 1976-05-26 | 1979-07-11 | Morgan J H | Electrolytic protection of structures |
-
1991
- 1991-11-04 US US07/787,249 patent/US5185921A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA689461A (en) * | 1964-06-23 | M. L. Heuze Bernard | Electrode structure | |
US3134731A (en) * | 1960-02-05 | 1964-05-26 | Sarl Soc D Etudes Contre La Co | Flexible anode device for use in the cathodic protection of metal structures |
US3326791A (en) * | 1962-05-26 | 1967-06-20 | Contre La Corrosion S E C C O | Method and structure for connecting electrodes to feed cables |
GB1548367A (en) * | 1976-05-26 | 1979-07-11 | Morgan J H | Electrolytic protection of structures |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340455A (en) * | 1993-01-22 | 1994-08-23 | Corrpro Companies, Inc. | Cathodic protection system for above-ground storage tank bottoms and method of installing |
US5743675A (en) * | 1994-08-03 | 1998-04-28 | Mears/Cpg, Inc. | Underground cable anode installment system |
US5885427A (en) * | 1997-06-12 | 1999-03-23 | Corrpro Companies, Inc. | Cast iron anode and method of making |
US20120125655A1 (en) * | 2010-11-23 | 2012-05-24 | Schutt William R | Seal for anode connection to cable and method of use |
WO2012071032A1 (en) * | 2010-11-23 | 2012-05-31 | Schutt William R | Seal for anode connection to cable and method of use |
US8502074B2 (en) * | 2010-11-23 | 2013-08-06 | Matcor, Inc. | Seal for anode connection to cable and method of use |
CN103403969A (en) * | 2010-11-23 | 2013-11-20 | 曼特克股份有限公司 | Seal for anode connection to cable and method of use |
CN103403969B (en) * | 2010-11-23 | 2016-06-01 | 曼特克股份有限公司 | Connect anode seal and the using method thereof of cable |
CN112195473A (en) * | 2020-09-12 | 2021-01-08 | 青岛赢海防腐防污技术有限公司 | Power-on protection device for inner wall of pipeline, construction method and machining method |
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